code: def test_cupy_scalar(self, dtype):
      sc = cupy.array(-1).astype(dtype)
      for v in (sc, [sc, sc]):
          assert cupy.min_scalar_type(v) is sc.dtype
  
imports: import unittest
  import sys
  import numpy
  import pytest
  import cupy
  from cupy._core import core
  from cupy import testing
  from cupy_tests.core_tests import test_raw
label_desc: Use image node_id 3 for calling the TestMinScalarType obj's underlying member method code with example usage: obj.test_cupy_scalar(dtype) without return types